Angled handpiece



C. A. HERMAN.

ANGLED H-ANDPIECE. APPLICATloN FILED JUNE 8,1920.

Patented June 7 192i,

maar' are.

CLAUDE A. HERMAN', 0F BRDGEPORT, CONNECTICUT.

ANGLED HANDPIECE.

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i Application le'd .Tune 8,

To aZZ whom t may concern:

Be it known that I, CLAUDE A. HERMAN, a citizen of the United States,` and resident of Bridgeport, in the 'county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Angled Handpieces, of which the following is a specilication. y

The object of this invention is to provide a handpiece with an interchangeable Isection adapted for connection at right angles and provided with a tool gripping means whereby more. convenient manipulationl may be had for operation upon certain classes of work. which will not accommodate the conventional handpiece Morespecically the invention resides in the provision of a yoke which is provided with means `for connection with the usual handpiece and having a transverse opening in which is seated a tool carrier, the entire arrangement being removab-le.

Other objects will more clearly hereinafter appear particularly by reference to the accompanying drawings forming a part of this specification and wherein like parts are designated by corresponding characters of reference throughout the several views, in which Figure l is a side elevation showing a grinding wheel applied to the handpiece.

Fig. 2 is a longitudinal sectional view showing the angle attachment in position,

Fig. 3 is a sectional view on line 2--2 of Fig. 2, Fig. 4 is a side elevation, parts being shown in section, of the handpiece and an attachment similar to that illustrated in Fig. l, and

Fig. 5 is a sectional view of a clampI for attaching a grinding stick to the handpiece.

In the drawing A- represents a cylindrical casing having a suitablel gripping surface and in which is arranged the rotatable stem B- formed with aXial sockets C- and D--. The socket C- is arranged for the reception of the driving shaft E which. connects with any suitable powelr and is locked in position by means of the set screw ewhich passes through a threaded opening formed in the stem and is provided 'with the ke y\e-.jinv place of the usual head. 'This screw e-.' is locked against rotation by means of thering cwhich is formed with a' longitudinal roove c in which the said key e' seats. n in;

Specification of Letters Patent.

Patented J une 7, 319231.

1920. Serial No. 387,400.

ternally threaded lock ring c is arranged to preventA the longitudinal movement of Fig. 2 is will be seenthat the drive gear E which is threaded on the end of the stem B and in mesh with the gear H drives through the medium of this gear the stem K the latter being arranged atright angle to the stern B and carrying the tool socket J. This stem K is housed within the cylindrical casing` F, the latter being carried by the yoke f and being seated within the transverse annular passage formed by the wall f. The yoke f is of hollow cylindrical form and receives the outer end of the casing A, being clamped to the casing by means of the clamp ring f. lt will be seen that a communicating passage g is arranged between the transverse annular passage and the interior of theyoke body whereby the gear H threadedon the stern K may mesh with the gear E carried on-the end of the stem. Ball bearings L are shown between the casing A and the stem B near each end to permit and facilitate the rotation of the stem. A felt packing b is provided in a pocket between the casing and stem as shown in Fig. 2. Similar ball bearings L are provided for the stem K, the lower set of bearings being between the shoulder Z and the beveled lower Vend of the casing G and the upper set being between the upper face of the ear H and the annular bearing plate Z. A nut Z threaded on the upper end of the stem K locks the bearing plate Z and other parts in place.

When the angle attachment renders an operation inconvenient it may be detached by unclamping the yoke from the sleeve A. The gear E can then be unscrewed from the end of the stern B and a tool or grinding wheel carrier of any of the forms illustrated in Figs. 1, fl o r 5 can be substituted.

The tool or grinding wheel carriers com- Referring to Fig. 4 the body M of the carrier has formed at one end the annular shoulder m against which the grinding wheel N abuts, and at the other end the reduced threaded shank m fonwhich is threaded the nut m. :i washer N is interposed between the nut m and the emery cloth covered rubber wheel N whereby it is possible to considerably reduce the size of the nut and obtain a greater clamping effect.

' In the form shown in F ig. 5 there is a nipple' P having internal threads at one end for the reception of the externally threaded end of the stein B, and external threads at its opposite end, the latter end also being formed with longitudinal slits p. ri`he locking or clamping ring P is formed withA internal threads for engagement with the external threads on the end of the nipple so that this end may be contracted for engagement with the grinding stick p.

In Fig. l there is shown in side elevation an attachment of similar construction generally as that shown in Fig. t, slightly modified, however, in the extended stem connection Q- to bet-ter provide for the use of the large grinding wheel R.

F rom the foregoing it will be obvious that any type of tool or grinding wheel clamp might be utilized provided same is provided with an internally threaded socket for the reception of the threaded end of the stem; It will be also noted that an interchange from the angled handpiece to the other forms may be made quickly and by the simple removal of the clamp ring f and the yoke, and the gear on the end of the stem B. It will also be seen that in each form a strong and durable device is piovided and that in no instance is there a com plicated arrangement of parts.

Various changes in the details and arrangement may be made without changing the nature of the invention, which is more clearly defined in the annexed claims.

`What l claim as new and useful and desire to secure by Letters' Patent, is

l. A handpiece comprising a casing, a rotatable stem arranged within said casing formed with a socket in one end for the reception of driving means adapted to rotate said stem, the opposite end of said stem being threaded, and a tool carrier connected to the threaded end of said stem.

2. A handpiece comprising a casing, a rotatable stem arranged within said casing and having driving means adapted to ro-y tate said stem connected at one end thereof, a' tool carrier, and means for detachably connecting said stem to said tool carrier.

3. A handpiece comprising a casing, a rotatable stein within said casing and a driving shaft connected thereto, a gear carried by one end of said stem, a tool carrier, a rotatable stem'arranged at an angle to said first mentioned stem and having a gear fixed insonni? ing a yoke, having a hollow thereto, a casing for the last mentioned stem, meansl for retaining the gearsin mesh, and means for detachably connecting said tool carrier upon said first mentioned rotatable stem.

g. A handpiece comprising a casing, a driven stem within said casing, a gear removably secured to one end of' said stem, a yoke having a hollow body portion for the reception of. one end of said casing and a transverse opening in one end, a communicating passage between the hollow body and said transverse opening, a rotatable tool carrier fitted in said transverse opening and having a driving gear fixed thereto and in mesh with the gear on the said stem, and means for locking said tool carrier in said casing.

5. An attachment for handpieces comprisbody for the reception of driving means and a` transverse opening in one' end, a casing extending through said transverse opening, a stem having an expansible tool socket in one-end arranged for rotation within said casing, a gear fixed to said stem, said gear being operatively connected to the driving means in said hollow body, and means for locking said stem 'in said body.

6: i handpiece for tools comprising a casing, a driven stem arrangedy within the casing, a bevel gear detachably secured to one end of said stem, a too-l carrier arranged at right angles to the longitudinal'axis of said stem and having a bevel gear fixed thereto,a casing for said tool carrier formed with a passage to permit the engagement of said gears, and a yoke inclosing said last mentioned casing to clamp the casings together.

7.- fi handpiece for tools comprisinga casing, a rotatable stem within the casing and having a. gear xed at one end and being adapted for connection with driving means at the other end, a yoke having a hollow body for the reception of one end of said casing and being formed with a transverse passage, a communicating opening formed between the said hollow body and transverse passage., means for clamping the yoke body to vsaid casing, a casing arranged within the transverse passage and being formed with an opening adapted to register with the cornmunicating opening, a. tool carrier rotatably 4mounted within the last mentioned casing and having a gear fixed thereto in engagement with the gear on said stem,and means for securing the tool carrier in said casing. l

Signed at Bridgeport, in the county of Fairfield and State of Connecticut, this 2nd day of June, A. D., 1920.

CLAUDE A.. HERMAN.

Witnesses z C. M. NEWMAN, LILLIAN M. ALLING. 

